Big Bang

The Big Bang functions as both a scientific model and a human origin story. The Big Bang model does not answer what caused the Big Bang, what preceded it, or whether it was unique. Modern observations support the broad Big Bang picture of a universe evolving from a hot, dense earlier state. Einstein believed the universe was static, unchanging, and eternal. A cyclic universe model allows expansion and collapse to repeat through many big bangs and big crunches. The article says humans have difficulty grasping infinity as a visceral concept. The multiverse is defined as the possibility that multiple universes exist.